[ClusterLabs] Moving resources and implicit bans - please explain?

Matthew Mucker nevo_n at hotmail.com
Wed Mar 16 15:38:06 EDT 2016

I have set up my first three-node Pacemaker cluster and was doing some testing by using "crm resource move" commands. I found that once I moved a resource off a particular node, it would not come back up on that node. I spent a while troubleshooting and eventually gave up and rebuilt the node.

After rebuild, the same thing happened. I then found in the documentation for the crm_resource command under the move command "NOTE: This may prevent the resource from running on the previous location node until the implicit constraints expire or are removed with −−unban"

This is a regrettably vague note. What dictates the conditions for "may prevent?" How do I determine what implicit constraints are present on my resources and when they'll expire?

I did find that explicitly removing bans with crm_resource -U solved my problem. However, I'd like to understand this further. Any explanation would be appreciated. A Google search on "pacemaker move resource ban" didn't find me anything that was obviously authoritative.

I'd appreciate any expertise the community could share with me!



More information about the Users mailing list